Remove keyIdentifier usage in chrome/browser/resources/*

chrome/browser/resources/chromeos/chromevox/cvox2/background/panel.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview The ChromeVox panel and menus.
  */
 
 goog.provide('Panel');
 
@@ skipping 476 matching lines @@
 
 /**
  * Called when a key is pressed. Handle arrow keys to navigate the menus,
  * Esc to close, and Enter/Space to activate an item.
  * @param {Event} event The key event.
  */
 Panel.onKeyDown = function(event) {
   if (event.altKey || event.ctrlKey || event.metaKey || event.shiftKey)
     return;
 
-  switch (event.keyIdentifier) {
-    case 'Left':
+  switch (event.key) {
+    case 'ArrowLeft':
       Panel.advanceActiveMenuBy(-1);
       break;
-    case 'Right':
+    case 'ArrowRight':
       Panel.advanceActiveMenuBy(1);
       break;
-    case 'Up':
+    case 'ArrowUp':
       Panel.advanceItemBy(-1);
       break;
-    case 'Down':
+    case 'ArrowDown':
       Panel.advanceItemBy(1);
       break;
-    case 'U+001B':  // Escape
+    case 'Escape':
       Panel.closeMenusAndRestoreFocus();
       break;
-    case 'Enter':  // Enter
-    case 'U+0020':  // Space
+    case 'Enter':
+    case ' ':  // Space
       Panel.pendingCallback_ = Panel.getCallbackForCurrentItem();
       Panel.closeMenusAndRestoreFocus();
       break;
     default:
       // Don't mark this event as handled.
       return;
   }
 
   event.preventDefault();
   event.stopPropagation();
@@ skipping 59 matching lines @@
 }, false);
 
 window.addEventListener('hashchange', function() {
   if (location.hash == '#fullscreen' || location.hash == '#focus') {
     this.originalStickyState_ = cvox.ChromeVox.isStickyPrefOn;
     cvox.ChromeVox.isStickyPrefOn = false;
   } else {
     cvox.ChromeVox.isStickyPrefOn = this.originalStickyState_;
   }
 }, false);